Dual support base fan



FIG. 1 is a front left side perspective view of the dual support base fan;

FIG. 2 is a front elevational view of the dual support base fan of FIG. 1;

FIG. 3 is a rear elevational view of the dual support base fan of FIG. 1;

FIG. 4 is a left side elevational view of the dual support base fan of FIG. 1;

FIG. 5 is a right side elevational view of the dual support base fan of FIG. 1;

FIG. 6 is a top plan view of the dual support base fan of FIG. 1; and,

FIG. 7 is a bottom plan view of the dual support base fan of FIG. 1.

The broken line showing of environmental structure is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a dual support base fan, as shown and described. 